<template>
    <div>
      <!--导航栏-->
      <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>添加商品</el-breadcrumb-item>
      </el-breadcrumb>

      <!--卡片试图-->
      <el-card>
        <el-alert title="添加商品信息" type="info" show-icon :closable="false" center></el-alert>

      <!--步骤条-->
        <el-steps :active="activeIndex-0" finish-status="success" align-center :space="200">
          <el-step title="基本信息"></el-step>
          <el-step title="商品参数"></el-step>
          <el-step title="商品属性"></el-step>
          <el-step title="商品图片"></el-step>
          <el-step title="商品内容"></el-step>
          <el-step title="完成"></el-step>
        </el-steps>

        <el-form label-width="70px" :model="addForm" :rules="addFormRules" ref="addFormRef" label-position="top">
          <!--标签页-->
          <el-tabs tab-position="left" v-model="activeIndex" :before-leave="beforeLeave" @tab-click="tabClick">
            <!--基本信息页-->
            <el-tab-pane label="基本信息" name="0">
              <el-form-item label="商品名称" prop="goods_name">
                <el-input v-model="addForm.goods_name"></el-input>
              </el-form-item>
              <el-form-item label="商品价格" prop="goods_price">
                <el-input v-model="addForm.goods_price"></el-input>
              </el-form-item>
              <el-form-item label="商品重量" prop="goods_weight">
                <el-input v-model="addForm.goods_weight"></el-input>
              </el-form-item>
              <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number"></el-input>
              </el-form-item>
              <el-form-item label="商品分类" prop="goods_cat">
                <el-cascader
                  v-model="addForm.goods_cat"
                  :options="cateList"
                  :props="cascaderProps"
                  clearable
                  @change="handleChange"
                >
                </el-cascader>
              </el-form-item>
            </el-tab-pane>

            <!--商品参数页-->
            <el-tab-pane label="商品参数" name="1">
              <el-form-item v-for="item in manyTableData" :key="item.attr_id" :label="item.attr_name">
                  <el-checkbox-group v-model="item.attr_vals" size="small">
                    <el-checkbox :label="value" v-for="(value,index) in item.attr_vals" :key="index" border></el-checkbox>
                  </el-checkbox-group>
              </el-form-item>
            </el-tab-pane>

            <!--商品属性页-->
            <el-tab-pane label="商品属性" name="2">
              <el-form-item v-for="item in onlyTableData" :key="item.attr_id" :label="item.attr_name">
                <el-input v-model="item.attr_vals"></el-input>
              </el-form-item>
            </el-tab-pane>

            <!--商品图片页-->
            <el-tab-pane label="商品图片" name="3">
              <el-form-item>
                <el-upload
                  :action="uploadURL"
                  :on-preview="handlePreview"
                  :on-remove="handleRemove"
                  :on-success="handleSuccess"
                  list-type="picture"
                  :headers="headers"
                >
                  <el-button size="small" type="primary">点击上传</el-button>
                </el-upload>
              </el-form-item>
            </el-tab-pane>

            <!--商品内容页-->
            <el-tab-pane label="商品内容" name="4">
              <quill-editor v-model="addForm.goods_introduce"></quill-editor>
              <el-button type="primary" class="addBtn" @click="addGood">添加商品</el-button>
            </el-tab-pane>
          </el-tabs>
        </el-form>
      </el-card>

      <!--图片预览框-->
      <el-dialog title="图片预览" width="50%" :visible.sync="preDialogVisible">
        <img :src="prePath" class="preImg">
      </el-dialog>
    </div>
</template>

<script>
import * as _ from 'lodash'
export default {
  name: 'AddGood',
  data () {
    return {
      activeIndex: '0',
      addForm: {
        goods_name: '',
        goods_cat: [],
        goods_price: 0,
        goods_number: 0,
        goods_weight: 0,
        goods_introduce: '',
        pics: [],
        attrs: []
      },
      addFormRules: {
        goods_name: [
          {
            required: true,
            message: '请输入商品名',
            trigger: 'blur'
          }
        ],
        goods_price: [
          {
            required: true,
            message: '请输入价格',
            trigger: 'blur'
          }
        ],
        goods_number: [
          {
            required: true,
            message: '请输入商品数量',
            trigger: 'blur'
          }
        ],
        goods_weight: [
          {
            required: true,
            message: '请输入商品重量',
            trigger: 'blur'
          }
        ],
        goods_cat: [
          {
            required: true,
            message: '请输入商品分类',
            trigger: 'blur'
          }
        ]
      },
      cateList: [],
      cascaderProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children',
        expandTrigger: 'hover',
        checkStrictly: false
      },
      manyTableData: [],
      onlyTableData: [],
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      // 传图片带上token
      headers: { Authorization: window.sessionStorage.getItem('token') },
      preDialogVisible: false,
      prePath: ''
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    async getCateList () {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) return this.$message.error('获取商品分类列表失败')
      this.$message.success('获取商品分类列表成功')
      this.cateList = res.data
    },
    handleChange () {
      if (this.addForm.goods_cat.length !== 3) {
        this.$message.error('请务必选择三级分类')
        this.addForm.goods_cat = []
        this.cateList = []
      }
    },
    beforeLeave (newTab, oldTab) {
      if (oldTab === '0') {
        if (this.addForm.goods_cat.length !== 3) {
          this.$message.error('请务必选择三级分类')
          return false
        } else if (this.addForm.goods_name.trim() === '0') {
          this.$message.error('请填写商品名称')
          return false
        } else if (this.addForm.goods_price.toString().trim() === '0') {
          this.$message.error('请填写商品价格')
          return false
        } else if (this.addForm.goods_number.toString().trim() === '0') {
          this.$message.error('请填写商品数量')
          return false
        } else if (this.addForm.goods_weight.toString().trim() === '0') {
          this.$message.error('请填写商品重量')
          return false
        }
      }
    },
    async tabClick () {
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: 'many' } })
        if (res.meta.status !== 200) return this.$message.error('获取动态参数列表失败')
        this.$message.success('获取动态参数列表成功')
        // attr_val转换为数组
        res.data.forEach(val => {
          val.attr_vals = val.attr_vals ? val.attr_vals.split(',') : []
        })
        this.manyTableData = res.data
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: 'only' } })
        if (res.meta.status !== 200) return this.$message.error('获取静态属性列表失败')
        this.$message.success('获取静态属性列表成功')
        this.onlyTableData = res.data
        console.log(this.onlyTableData)
      }
    },
    handlePreview (file) {
      this.prePath = file.response.data.url
      this.preDialogVisible = true
    },
    handleRemove (file) {
      const filePath = file.response.data.tmp_path
      _.remove(this.addForm.pics, function (ele) {
        return filePath === ele.pic
      })
    },
    handleSuccess (res) {
      this.addForm.pics.push({ pic: res.data.tmp_path })
      console.log(this.addForm.pics)
    },
    addGood () {
      this.$refs.addFormRef.validate(async valid => {
        // 验证失败
        if (!valid) return this.$message.error('请填写完整的商品信息')
        // 深拷贝得到两个独立的数组,复制品操作不影响原数组addForm
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = _.join(form.goods_cat, ',')
        // 添加动态参数到form
        _.forEach(this.manyTableData, item => {
          form.attrs.push({ attr_id: item.attr_id, attr_value: item.attr_vals.join(',') })
        })
        // 添加静态属性到form
        _.forEach(this.onlyTableData, item => {
          form.attrs.push({ attr_id: item.attr_id, attr_value: item.attr_vals })
        })
        // 提交添加用户请求
        const { data: res } = await this.$http.post('goods', form)
        // 创建成功返回201
        if (res.meta.status !== 201) return this.$message.error('添加商品失败')
        this.$message.success('添加商品成功')
        this.$router.push('/goods')
      })
    }
  },
  computed: {
    cateId () {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style scoped>
  .el-step {
    margin: 15px 0;
  }
  .preImg{
    width: 100%;
  }
  .addBtn{
    margin-top: 15px;
  }
</style>
